There have been two Baronetcies created for persons with the surname Mildmay, one in the Baronetage of England and one in the Baronetage of Great Britain. Both creations are extinct.

The Mildmay Baronetcy, of Moulsham in the County of Essex, was created in the Baronetage of England on 29 June 1611 for Thomas Mildmay, previously Member of Parliament

Member of Parliament

A Member of Parliament is a representative of the voters to a :parliament. In many countries with bicameral parliaments, the term applies specifically to members of the lower house, as upper houses often have a different title, such as senate, and thus also have different titles for its members,...

 for Maldon

Maldon (UK Parliament constituency)

Maldon is a county constituency represented in the House of Commons of the Parliament of the United Kingdom. It elects one Member of Parliament by the first past the post system of election...

. He was the grandson of Sir Thomas Mildmay, Auditor of the Court of Augmentation, elder brother of Sir Walter Mildmay

Walter Mildmay

Sir Walter Mildmay was an English statesman who served as Chancellor of the Exchequer of England under Queen Elizabeth I, and was founder of Emmanuel College, Cambridge.-Early life:...

. The title became extinct on his death in 1626. Mildmay's brother Henry Mildmay claimed the barony of FitzWalter

Baron FitzWalter

Baron FitzWalter is an ancient title in the Peerage of England. It was created in 1295 for Robert FitzWalter. The title was created by writ, which means that it can descend through both male and female lines. His great-grandson, the fourth Baron, was an Admiral of the Fleet. His grandson, the...

. In 1667 Henry's grandson Benjamin Mildmay was confirmed in the title.

The Mildmay Baronetcy, of Moulsham in the County of Essex, was created in the Baronetage of Great Britain on 5 February 1765 for William Mildmay. He was a descendant of William Mildmay, uncle of the first Baronet of the 1611 creation. The title became extinct on his death in 1771. The late devolved his estates to his kinsman Carew Mildmay, who in his turn bequeathed the estates to his grand-niece, Jane Mildmay, wife of Sir Henry St John, 2nd Baronet, whose son Sir Henry St John-Mildmay, 3rd Baronet assumed the additional surname of Mildmay (see St John-Mildmay Baronets

St John-Mildmay Baronets

The St John, later St John-Mildmay Baronetcy, of Farley in the County of Southampton, is a title in the Baronetage of Great Britain. It was created on 9 October 1772 for Paulet St John, Member of Parliament for Winchester and Hampshire. The second Baronet represented Hampshire in the House of...

for further history of this title).